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| Number | Title | Issue Date |
| 7333915 | Signal conditioning arrangement and method of conditioning a signal A signal conditioning arrangement includes a sensor arrangement for sensing a measured quantity and for outputting an output signal having a first or a second logical signal state based on the measured quantity, and means for generating an evaluating impulse if the ... | 02/19/2008 |
| 5856792 | Interrupt driven method of remote control An interrupt apparatus for remotely controlling a potentiometer is comprised of an encoder for generating a pair of quadrature output signals whenever the encoder becomes rotated. The pair of signals are sent to a pair of D flip-flops for detecting a risi... | 01/05/1999 |
| 5815089 | Device for transmitting signals from position detector and method of such signal transmission A transmitting device, for transmitting position detector signals, comprises a controller for processing signals on various kinds of data from an object of interest; a position detector that has a magnetic pole detecting portion and which detects position... | 09/29/1998 |
| 5625353 | Device for transmitting signals from position detector and method of such signal transmission A transmitting device, for transmitting position detector signals, comprises a controller for processing signals on various kinds of data from an object of interest; a position detector that has a magnetic pole detecting portion and which detects position... | 04/29/1997 |
| 5428352 | Closed loop circuit for a differential capacitive sensor A closed loop circuit for controlling a differential capacitive sensor has been provided wherein the differential capacitive sensor includes a rigid top and bottom plate, and a movable middle plate. The closed loop circuit has a clock period which is divi... | 06/27/1995 |
| 4502003 | Two wire circuit having an adjustable span A two wire circuit has a total direct current signal, It, proportional to a sensor signal which is responsive to a parameter to be sensed. It flows through a first terminal which is coupled to an external power source and load and th... | 02/26/1985 |
| 4423412 | Industrial process indicating/recording apparatus using stepping motor drive A compact ribbon-indicator and chart-recorder instrument for use in process control systems adapted to indicate and simultaneously record the values of up to three independent process variables. The motive power for each pen/indicator drive system is supp... | 12/27/1983 |
| 4390879 | Apparatus for converting physical quantities An apparatus is disclosed for converting a physical quantity into variations in electric current. The apparatus comprises a power source, a control circuit for controlling an output amplitude of the power source, a detecting circuit supplied with the outp... | 06/28/1983 |
| 4310841 | Signal handling apparatus Signal-processing apparatus for use with industrial instrumentation systems and the like, and comprising a memory to maintain a signal level for long time periods without drift. An input signal level is translated into the positioning of a movable member,... | 01/12/1982 |
| 4296412 | Method and apparatus for signal transmission Differential pulse code modulation (DPCM) is used for a fast digital transmission of the analog input signal. In the DPCM modulator, a difference is built between the scaled input signal and the output of a digital/analog converter, which is controlled by... | 10/20/1981 |
| 4290065 | Position transducing method and means The position transducer uses an elongated resistance which can be switched to a fixed voltage source to provide a voltage gradient along the resistance. A metal strip with a single aperture is arranged to be moved along parallel to the resistance and anot... | 09/15/1981 |
| 4263583 | Digital alarm system with variable alarm hysteresis A digital alarm system for monitoring a variable process signal utilizing a variable, digitally controlled alarm hysteresis capability. The system includes a means for establishing a preselected count level at which an alarm condition occurs. The preselec... | 04/21/1981 |
| 4115785 | Open circuit detector for multipoint recorder A string of short pulses is impressed across the input circuit of a multipoint recorder and a pulse magnitude detecting circuit. If the input circuit is open, the magnitude of the pulses appearing at the pulse magnitude detecting circuit is higher than wo... | 09/19/1978 |
| 4087796 | Analog-to-digital conversion apparatus An analog-to-digital converter utilizing a pulse density concept wherein a pulse generator is used and the rate of generation of pulses is a function of the difference between the analog input and the indicated digital output. The pulses are utilized in a... | 05/02/1978 |
| 4062004 | Dual range, torque rebalancing of inertial sensor The pulse torque rebalancing feedback applied to a gyro, or other inertial sensor, is selected to be a low current for low angular rates (or other outputs) and is selected to be a high current, such as eight times greater than the low current, for high an... | 12/06/1977 |
| 3967064 | Low noise electronic circuit, transducer using the same, and method An electronic circuit and method used in conjunction with transducers for eliminating noise signals which includes an AC source of excitation for first and second transducer coils, called pickoff coils located in first and second signal channels. Output f... | 06/29/1976 |
| 3962618 | Digital following error measurement system A following error measurement system for phase analog servo systems is disclosed. The leading or lagging status of a phase analog servo system's command signal with respect to its feedback signal, is used to create a variable width error signal. This vari... | 06/08/1976 |
| 3939471 | Liquid level tamper alarm A liquid level transducer actuates a relay to sound an alarm when there is a change in a liquid level in a tank. A bridge circuit is balanced at an existing liquid level to maintain the relay normally deenergized. A change in the liquid level unbalances t... | 02/17/1976 |
| 3939389 | Positioning control apparatus A device for positioning a part comprises a signal generator which, upon movement of said part within the vicinity of a required position of the part, produces a signal value which passes through zero at a point when said part is in said required position... | 02/17/1976 |
